Technical Service Bulletins
Search 172,063 manufacturer communications covering 879 vehicle makes from 1955 to 2025.
Showing 440 bulletins for KENWORTH
TIB-E-050
Jan 23, 2012
061000 ENGINE AND ENGINE COOLING:ENGINE
KENWORTH: ENGINE CONTROL UNIT (ECU), IDENTIFIED AS PMCI IN ENGINE RAPIDO, SHOULD HAVE A PROTECTIVE SHIELD FOR SOFTWARE UPDATES AND THE HC DOSER FITTING INSTALLED FOR AFTER AFTERTREATMENT CONTROL UNIT. *PE
SB-E-049
Jan 13, 2012
061000 ENGINE AND ENGINE COOLING:ENGINE
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ERRONEOUS FAULT CODES MAY DEVELOP IN CHASSIS OR CHECK ENGINE WARNING LIGHT RELATED TO NOX EMISSIONS MEASUREMENT AND AFTERTREATMENT IF IMPROVEMENT FOR THE RECALIBRATION OF ENGINE CON
TIB-02-117
Dec 6, 2011
162800 STRUCTURE:BODY:HOOD
KENWORTH: INFORMATION REGARDING TRUCKS RECEIVING NEWLY INSTALLED LATCHES TO HOLD DOWN HOOD, REPLACING PREVIOUS DESIGN LATCH. *PE
TIB-E-018
Dec 3, 2011
061200 ENGINE AND ENGINE COOLING:ENGINE:DIESEL
PACCAR: CURRENT OIL MODULES ON THE ENGINES HAVE PRODUCT IMPROVEMENTS. *RM
TIB-44-020
Nov 22, 2011
072200 FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
KENWORTH: INFORMATION REGARDING ORIGINAL EQUIPMENT FITTINGS NOT MATING PERFECTLY AND RESULT IN LEAKS AND/OR AIR INGESTION DUE TO THE 37 DEGREE FITTINGS FLARED FUEL LINE TO FUEL FILTER FITTINGS INSTEAD OF THE 45 DEGREE. *PE
TIB-43-024
Nov 21, 2011
061000 ENGINE AND ENGINE COOLING:ENGINE
KENWORTH: INFORMATION IN BULLETIN PERTAINING TO POSSIBLE ENGINE DERATE BY WHICH THE DEF FILTERS ARE CLOGGED AND/OR CONTAMINATED DEF IS IDENTIFIED. *PE
TIB-43-23
Nov 8, 2011
063000 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
KENWORTH: INFORMATION REGARDING REAR NOX SENSOR REPAIRS SHOULD INCLUDE SYSTEM UPDATES FOR CHASSIS OPERATING IN CONDITIONS WHICH RESULT IN MOISTURE RELATED SENSOR FAILURES WITH IMPROVED MOISTURE PROTECTION EXHAUST DESIGN FOR REAR NOX SENS
TIB-43-22
Oct 31, 2011
063000 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. BULLETIN REFERS TO THE DUAL EXHAUST REAR NOX SENSOR MOISTURE PROTECTION CAMPAIGN. TO DIVERT MOISTURE FROM THE REAR (SCR OUTLET) NOX SENSOR THERE IS A NEW DESIGN FOR EXHAUST ELEMENT.
TIB-45-042
Oct 31, 2011
061000 ENGINE AND ENGINE COOLING:ENGINE
KENWORTH: INFORMATION PERTAINING TO UPDATING THE ENGINE ON CERTAIN TRUCKS FOR NEW PRODUCTIVE ENGINES. EMISSIONS LABEL WITH REQUIRED CLARIFICATION. *PE
TIB-36-002
Oct 21, 2011
118000 ELECTRICAL SYSTEM:SOFTWARE
KENWORTH: BULLETIN PROVIDING INFORMATION ON TECHNICAL SUPPORT FOR THE NAVPLUS TECHNICAL ISSUES AND OTHER SYSTEM RESOURCES TO RESOLVE NAVPLUS. *PE
TIB-E-045
Oct 17, 2011
118000 ELECTRICAL SYSTEM:SOFTWARE
KENWORTH: FOR CERTAIN TRUCKS, THE ENGINE CONTROL UNIT (ECU), IDENTIFIED AS PMCI IN ENGINE RAPIDO, AND AFTERTREATMENT CONTROL UNIT WILL BENEFIT FROM SOFTWARE UPDATES. *PE
TIB-E-047
Sep 26, 2011
355100 EQUIPMENT:OTHER:LABELS
KENWORTH TRUCK: ON CERTAIN TRUCKS, THE CORRECT EMISSIONS COMPLIANCE LABEL FOR THE PACCAR MX ENGINE IS MISSION ON THE IDENTIFIED CHASSIS. *PE
TIB-16-35
Sep 16, 2011
356000 EQUIPMENT ADAPTIVE/MOBILITY
KENWORTH: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THE FRONT AXLE U BOLTS WERE MANUFACTURED ON CERTAIN T3 AND T4 SERIES TRUCKS WITH INSUFFICIENT TORQUE. *PE
TIB-26-21
Sep 12, 2011
103000 POWER TRAIN:AUTOMATIC TRANSMISSION
KENWORTH: ON CERTAIN TRUCKS, THE EATON TRANSMISSIONS MAY BE SUSCEPTIBLE TO HAVING WATER INTRUSION WHICH CAN CAUSE THE ECU TO STOP WORKING. LOSS OF COMMUNICATION AND PRIMARY FUNCTION MAY REQUIRE REPLACEMENT OF THE ECU'S FAILURE MODE.
TIB-42-49
Sep 9, 2011
062100 ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY
KENWORTH: CERTAIN MODEL TRUCKS WILL HAVE AN INCOMPLETE DEAERATION WHEN RADIATOR IS DRAINED AND THEN REFILLED DUE TO AN IMPROPER COOLANT LINE ROUTING. *PE
TIB-03-40
Sep 1, 2011
118000 ELECTRICAL SYSTEM:SOFTWARE
PACCAR SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THERE IS A SOFTWARE PROBLEM WITH THE VEHICLE MONITORING SYSTEM. *RM
TIB-34-039
Sep 1, 2011
021244 SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY:U-BOLT, LEAF SPRING TO AXLE
PACCAR SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. INFORMATION ON THE FRONT DRIVE AXLE SPEED WARNING DISPLAY. *RM
TIB-45-41
Sep 1, 2011
357100 EQUIPMENT:APPLIANCE:AIR CONDITIONER
PACCAR SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. THE AIR CONDITIONING LINE DOES NOT MEET SPECIFICATIONS. *RM
TIB-E037
Aug 29, 2011
015100 STEERING:HYDRAULIC POWER ASSIST:PUMP
KENWORTH: POWER STEERING PUMP SPOOL VALVE DOES NOT MEET QUALITY STANDARDS. THERE MAY BE A LACK OF STEERING ASSIST OR HARD STEERING AT IDLE. *RM
SB-13-34
Aug 26, 2011
114005 ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
KENWORTH: TRAILER BRAKES WILL NOT RELEASE. *RM
TIB-44-19
Aug 12, 2011
092300 FUEL SYSTEM, OTHER:FUEL FILTER
PACCAR: WATER MAY SEEP BETWEEN THE WIRE INSULATION AND POTTING OF THE FUEL SENSOR. THERE MAY BE AN ERRATIC FALSE WARNING OF WATER IN FUEL. *RM
TIB-03-042
Aug 5, 2011
091200 FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM
PACCAR: THE FUEL SENSORS MIGHT NOT HAVE A SEALANT PLUG WHICH COULD LEAD TO WATER INTRUSION, CORROSSION, AND FALSE READINGS. *RM
TIB-03-043
Aug 5, 2011
091200 FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM
PACCAR INC: FUEL SENSOR INDICATING LESS THAN FULL WHEN THE TANK IS FULL. *RM
TIB-03-044
Aug 5, 2011
091200 FUEL SYSTEM, OTHER:STORAGE:FUEL GAUGE SYSTEM
PACCAR INC: PROGRAMMING CAMPAIGN TO ALLOW PROPER WARNING TIME BEFORE FUEL TANK IS EMPTY. *RM